2016-04-28 05:40:58 +02:00
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from django.conf import settings
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import codecs
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import hashlib
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import hmac
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# Encodes the provided URL using the same algorithm used by the camo
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# caching https image proxy
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def get_camo_url(url):
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2016-06-04 19:52:48 +02:00
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# type: (str) -> str
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2016-04-28 05:40:58 +02:00
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# Only encode the url if Camo is enabled
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if settings.CAMO_URI == '':
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return url
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encoded_url = url.encode("utf-8")
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encoded_camo_key = settings.CAMO_KEY.encode("utf-8")
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digest = hmac.new(encoded_camo_key, encoded_url, hashlib.sha1).hexdigest()
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hex_encoded_url = codecs.encode(encoded_url, "hex")
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return "%s%s/%s" % (settings.CAMO_URI, digest, hex_encoded_url.decode("utf-8"))
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